Fair point. I used 1% at the very low end -- if the amount is small enough (in the $1/month range) I think the opt-in rate would be much higher. I would then g

Fair point. I used 1% at the very low end -- if the amount is small enough (in the $1/month range) I think the opt-in rate would be much higher. I would then give a free account to anyone who asks. ("We know that even $1/month is a big ask for some folks in certain countries or they may even have a method by which to pay it. If that's you, let us know and apply for a free account here.") Then basically auto-approve (with some bot-screening mechanism) accounts that apply. Sure you'll get some abuse and people lying, but not that many people are going to lie just to save $1/month.